Gable header for a sign



FIG. 1 is a perspective view showing my new design,

FIG. 2 is both a left and a right side elevational view,

FIG. 3 is both a front and a rear elevational view,

FIG. 4 is a top plan view; and,

FIG. 5 is a bottom plan view.

The ornamental design for a gable header for a sign, as shown anddescribed.